Instrument for extracting splinters

• US 4,494,543 A
• Filed: 03/05/1982
• Issued: 01/22/1985
• Est. Priority Date: 03/05/1982
• Status: Expired due to Fees

• Current Assignee: Ernest D. Hart
• Original Assignee: Ernest D. Hart
• Inventors: Hart, Ernest D.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Lester, Michelle N.
• Application Number:
  US06/354,144
• Time in Patent Office: 1,054 Days
• Field of Search: 128/354, 128/314, 128/329 R, 128/330, 128/329 A, 128/355, 128/303.13, 128/303.18, 81/43
• US Class Current: 606/133
• CPC Class Codes: A61B 17/30 Surgical pincettes without pivotal connectionsfor holding suture needles or materials A61B17/0483; wound clamps A61B17/08 ; hand-held gripping tools without pivotal connections in general B25B9/02
• CPC Class Codes: A61B 17/50 Instruments, other than pincettes or toothpicks, for removing foreign bodies from the human body locating otherwise A61B5/06; locating by radiation A61B6/00; removing calculi A61B17/22; from the eyes A61F9/00709

Abstract

An instrument for extracting splinters and the like, having a hollow elongated handle; a pair of resilient arms, the arms being mounted externally on the handle, having jaws disposed outwardly of a tip end of the handle, and extending along the handle toward its opposite end; a rod having a piercing end at the tip end of the handle and being slidably received within the cavity for movement between an operating position in which the piercing end extends outwardly of the jaws and a sheathed position in which this end is adjacent to the tip end; a spring urging the rod toward the sheathed position; a plunger extending within the cavity at such opposite end to engage the rod and having a button to press the rod into the operating position; a latch mounted on the plunger for latching the rod in this position; and a trigger operable by pressing one of the arms toward the handle to unlatch the rod from the handle for return by the spring to the sheathed position.

Claims

1. An instrument for extracting splinters and the like comprising:

A. an elongated handle having a pair of opposite ends and defining a central cavity extended longitudinally within the handle from one such end;

B. a pair of elongated arms which are mounted on the handle and disposed transversely oppositely and exteriorly thereof and are extended longitudinally thereof, the arms having respective jaws which are extended longitudinally from the handle beyond said one end and are aligned in a direction transversely thereof, one of the arms being mounted on the handle for movement of the jaw thereof from the other of the jaws and toward such other jaw for engagement therewith, and such one arm having means for resiliently urging the jaw thereof from such other jaw;

C. an elongated member having a piercing end and an opposite end, said member extending within the cavity with the piercing end disposed at such one end of the handle and said member being received in the cavity for movement longitudinally of the cavity between a retracted position in which the piercing end is longitudinally spaced from the jaws in a direction toward the end of the handle opposite such one end and an extended position in which said end is extended beyond the jaws longitudinally of the handle from the cavity and said one end;

D. retracting means for resiliently urging the elongated member longitudinally of the handle in a direction from the extended position toward the retracted position;

E. manually actuatable extending means for urging the elongated member into the extended position from the retracted position against the urging of the retracting means;

F. means for latching the elongated member to the handle to retain said member in the extended position when the elongated member is urged thereto by the extending means; and

G. manually actuatable means for unlatching the elongated member from the handle when said member is latched thereto in the extended position so that said member moves to the retracted position under the urging of the retracting means.

2. The instrument of claim 1 wherein

A. said one arm has a first surface disposed oppositely of the handle for manual engagement to move said arm toward the handle and move the jaw of said arm toward such other jaw and has a second surface disposed toward the handle, and

B. the means for unlatching the elongated member from the handle comprises a trigger extended toward said second surface and movable in a direction from said surface toward the handle to unlatch the elongated member therefrom so that movement of said one arm toward the handle to engage the jaws when the elongated member is latched in the extended position unlatches said member from the handle for movement into the retracted position.

3. The instrument of claim 2 wherein:

A. each of the arms is constructed of resilient material and has a proximal end fixedly connected to the handle toward the end thereof opposite said one end and a portion which extends alongside the handle from the proximal end to the corresponding jaw, said portion being configured so that, when the arm is in an unconstrained configuration, said portion is spaced transversely of the handle so that grasping the arms individually oppositely of the handle urges the arms to bend theretoward moving the jaws together and straining the arms so that the arms are resiliently urged to return the unconstrained configuration, and said one arm has a projection extending from said portion thereof toward the handle and bearing said second surface;

B. the handle defines a recess therein opening toward the projection; and

C. the trigger is received in the recess so that, when the one arm bends from said such configuration toward the handle, said projection engages the trigger to unlatch the elongated member from the handle.

4. An instrument for extracting splinters and the like comprising:

A. an elongated handle having a pair of longitudinally opposite ends and defining a cavity which extends longitudinally through the handle and opening through such end, and a recess which extends from the cavity in a direction transversely of the handle;

B. a pair of elongated arms constructed of resilient material, each arm having a distal end bearing a jaw which is spaced outwardly of one of the opposite ends of the handle in a direction longitudinally therealong and is aligned in a direction transversely of the handle with the jaw of the other arm;

having a proximal portion fixedly connected to the handle toward the opposite end thereof; and

having a central portion extended between the distal end and the proximal end exteriorly of the handle, the arms being mounted on the handle transversely oppositely thereof and being configured so that, when the arms are unconstrained, each central portion is spaced from the handle in a direction transversely thereof and the jaws are spaced apart in such a direction;

C. an elongated member disposed in the cavity and extended longitudinally of the handle, said member having a piercing end disposed at said one end of the handle and an opposite end and being slidably fitted to the handle for movement longitudinally thereof between a sheathed position in which the piercing end is disposed adjacent to said one end of the handle and an operating position in which the member extends from the cavity and from said one end between the jaws with the piercing end disposed oppositely of the jaws from said one end;

D. a plunger disposed in the cavity toward said opposite end of the handle and slidably received therein for movement longitudinally thereof, the plunger having a button spaced longitudinally thereof, the plunger having a button spaced longitudinally outwardly of the handle and being engaged with said opposite end of the elongated member;

E. retracting means mounted on the handle and engaged with the elongated member for resiliently urging said member to move toward the retracted position, so that said opposite end of the member engages the plunger and carries the plunger in a direction from the one end of the handle toward said opposite end thereof as the elongated member moves toward the sheathed position and so that pressing said button toward the handle moves the plunger toward said one end of the handle carrying the elongated member toward the operating position against the resilient urging of the retracting means;

F. a latch assembly mounted on the plunger for movement therewith longitudinally of the cavity, said assembly having a latch which is mounted on the plunger for movement independently of the plunger in a direction transversely of the handle and is disposed to enter the recess when the elongated member is in its operating position, and having means for urging the latch into latching engagement with the recess; and

G. unlatching means mounted on the handle and operably connected to the central portion of one of the arms for actuating the latch assembly, when the one arm moves from its unconstrained configuration toward the handle, to urge the latch from the recess so that the retracting means motivates the elongated member toward the sheathed position.

5. The instrument of claim 4 wherein

A. the handle has an exterior surface disposed toward the central portion of said one of the arms and the recess extends transversely through the handle between said surface and the cavity, and

B. the unlatching means comprises a projection mounted on said central portion and extended toward the recess for engagement of the latch assembly therein when said assembly is in said latching engagement.